Julio Molleda

University of Oviedo | UNIOVI · Department of Information Technology

Interoperability issues on networks of heterogeneous devices create a relevant and complex challenge. The Word Wide Web Consortium (W3C) develops a series of specifications, called the Web of Things (WoT), to address this challenge. WoT is focused on integrating smart things into the application layer of a system using on Web technologies. Thus, Wo...

Modern, high-speed, railway transportation requires rails to conform strictly to requirements specified in various standards. One key requirement is the conformance of the dimensions of the rail cross section to those of the corresponding rail model, within tight tolerances. This paper deals with a system for dimensional quality inspection during t...

Managing energy consumption in buildings is of utmost importance given the fact that 20% of the total energy consumed worldwide comes from the buildings sector. The miniaturization of electronic and mechanical systems, together with low-power wireless communications, facilitate the development and deployment of building energy management systems (B...

El aprendizaje basado en proyectos permite desarrollar competencias de enorme importancia, incluyendo las necesarias competencias transversales donde se incluyen aspectos como la capacidad de resolver problemas, la capacidad para tomar decisiones, habilidades de comunicación, de organización del trabajo y de gestión del tiempo. En este proyecto de...

Profile measuring is a key data acquisition process in the rail manufacturing industry. In rail rolling mills, profile measurement systems inspect the shape of the rail profiles to assess their dimensional quality. This assessment can be used in order to provide feedback for shape control devices in upstream manufacturing, and also to check whether...

Many Internet of Things platforms use dedicated software coupled with proprietary devices and interfaces, creating silo solutions with no interoperability. The Web of Things paradigm promotes using open Web standards to connect physical objects to the Internet through an application layer. In this paper, we propose a low-cost, indoor air quality mo...

Visual surveillance is of paramount importance in public spaces and especially in train and metro platforms which are particularly susceptible to many types of crime from petty theft to terrorist activity. Image resolution of visual surveillance systems is limited by a trade-off between several requirements such as sensor and lens cost, transmissio...

During the production of steel strips, a large amount of surface defects can be generated, due to harsh environmental conditions. A high number of surface defects can lead to rejection by the customer, which represents significant economic losses to the production plant. Thus, it is very important to detect the presence and type of the defects gene...

Steel rails used in the transport sector and in industry are designed and manufactured to support high stress levels generated by high-speed and heavy-loaded modern trains. In the rail manufacturing process, one of the key stages is rolling, where fast, accurate, and repeatable rail profile measurement is a major challenge. In this paper, a rail pr...

Steel rails used in the transport sector and in industry are designed and manufactured to support high stress levels generated by high-speed and heavy-loaded modern trains. In the rail manufacturing process, one of the key stages is rolling, where fast, accurate and repeatable rail profile measurement is a major challenge. In this paper, a rail pro...

Flatness measurement and control is a requirement in the production of high quality rolled steel products. One of the most popular measurement methods is based on laserlight sectioning sensors. This method is based on the projection of a laser stripe onto the steel strip while it moves forward along a roll path. The extraction of the laser stripes...

The detection of defects in steel strips is a very important task which can improve the performance of factories by giving the possibility of early and real-time detection of defects. Defect detection methods have such a large amount of parameters that makes finding the best configuration a complex task. The search space of the value of these param...

Real-time interactive multimedia communications are becoming increasingly useful for education, business, e-commerce and e-government, providing an enriched user experience in teleconferencing, e-meetings, distance training and product demonstrations. Large corporations are usually located at several sites, so real-time multipoint sessions within c...

Efficient registration is a major challenge for real-time machine vision applications. Modern acquisition hardware can produce data at extremely high rates. Thus, efficient registration algorithms are required to align data to reference models to detect deviations and take correcting actions if needed. In this work, an efficient registration proced...

3D reconstruction based on laser light projection is a well-known method that generally provides accurate results. However, when this method is used for inspection in uncontrolled environments, it is greatly affected by vibrations. This paper presents a structured-light sensor based on two laser stripes that provides a 3D reconstruction without vib...

The intensity of the infrared radiation emitted by objects is mainly a function of their temperature. In infrared thermography, this feature is used for multiple purposes: as a health indicator in medical applications, as a sign of malfunction in mechanical and electrical maintenance or as an indicator of heat loss in buildings. This paper presents...

Endless strip generation is the key to productivity and quality in several types of steel coil production lines. Coil-tocoil joining by means of welding machines provides such a strip. Since the joint is the weakest area of the strip, its quality must be assessed for the production line to accept it. Therefore, it is necessary to inspect the qualit...

Vibrations present a major challenge for accurate 3D reconstruction of moving objects. When the movement of the object is affected by vibrations, the reconstruction system estimates height profiles incorrectly, which leads to major errors in the reconstructed shape of the object. This work proposes a laser-based 3D reconstruction method that uses m...

Defect detection is becoming an increasingly important task during the manufacturing process. The early detection of faults or defects and the removal of the elements that may produce them are essential to improve product quality and reduce the economic impact caused by discarding defective products. This point is especially important in the case o...

Measurement, inspection and quality control in industry have benefited from 3D techniques for imaging and visualization in recent years. The development of machine vision devices at decreased costs, as well as their miniaturization and integration in industrial processes, have accelerated the use of 3D imaging systems in industry. In this paper we...

Existing face imaging systems are not suitable to meet the face representation and recognition demands for emerging applications in areas such as interactive gaming, enhanced learning environments and directed advertising. This is mainly due to the poor capture and characterisation of facial data that compromises their spatial and temporal precisio...

Periodical defect detection is a task of great importance during the production of web materials. It can reduce the appearance of a large number of surface defects, which is of vital importance to keep the product quality. In this article, a system used to detect these defects is optimized. This is carried out by looking for the optimal values for...

Vibrations are periodic or random motion from an equilibrium position. In the steel industry, vibrations are an undesirable phenomenon, as they waste energy and create unwanted noise. For example, vibrations affect steel strips during rolling and transportation, producing random or periodic vertical movements of the strips as they move forward alon...

Sintering is an industrial process used in the steel industry to transform fine particles of iron ore into coarse grained iron known as sinter. During the process, iron ore fines are mixed with other products such as coke fines and fired at a temperature below the melting point of the material. A rotatory cooler is later used to reduce the temperat...

High efficiency and availability in industrial processing lines are requirements to produce top-grade steel at a minimum cost. One of the most important aspects in achieving these goals is efficient automation, which ensures high performance and reduces the cost of production. This work proposes a new system to improve the automation of a steel pro...

Shape is a key characteristic to determine the quality of outgoing flat-rolled products in the steel industry. It is greatly influenced by flatness, a feature to describe how the surface of a rolled product approaches a plane. Flatness is of the utmost importance in steelmaking, since it is used by most downstream processes and customers for the ac...

Sintering is a complex industrial process that applies heat to fine particles of iron ore and other materials to produce sinter, a solidified porous material used in blast furnaces. The sintering process needs to be carefully adjusted, so that the combustion zone reaches the bottom of the material just before the discharge end. This is known as the...

This article proposes a technique to detect the defects caused by defective work roll. This system inspects the surface (top and bottom) of each strip. The images captured by the cameras are then processed. It includes a way to store the information necessary for detection as well as a flexible algorithm that uses this information efficiently. To t...

Real-time image and video processing applications require skilled architects, and recent trends in the hardware platform make the design and implementation of these applications increasingly complex. Many frameworks and libraries have been proposed or commercialized to simplify the design and tuning of real-time image processing applications. Howev...

Vanishing point (VP) detection is an important task in computer vision with particular importance in video surveillance. However, despite having numerous applications in camera calibration, 3D reconstruction and threat detection, a general method for VP detection has remained elusive. Rather than attempting the infeasible task of VP detection in ge...

During the production of web materials such as plastic, textiles or metal, where there are rolls involved in the production process, periodically generated defects may occur. If one of these rolls has some kind of flaw, it can generate a defect on the material surface each time it completes a full turn. This can cause the generation of a large numb...

Endless strip generation is the key to productivity and quality in several types of steel coil production lines. Coil-to-coil joining by means of welding machines provides such a strip. Since the joint is the weakest area of the strip, its quality must be assessed in order for the production line to accept it. Therefore, it is necessary to inspect...

Quality evaluation of rolling processes in the metal industry involves an inspection of the shape of the outgoing products in real time during manufacturing. Shape measurement systems are usually based on 3-D reconstructions of the surface of rolled products. As surface properties are crucial, these systems favor contactless techniques. Using 3-D m...

Real-time image and video processing applications require skilled architects, and recent trends in the hardware platform make the design and implementation of these applications increasingly complex. Many frameworks and libraries have been proposed or commercialized to simplify the design and tuning of real-time image processing applications. Howev...

Accurate temperature measurement in industrial environments is as important as it is challenging. Precise control over temperature measurement is crucial when processing metals, such as iron or steel, where temperature monitoring is critical to productivity and product quality. In the steel manufacturing process, temperature measurement of molten p...

Assessing the quality of a weld in the steelmaking industry is a complex task. The level of complexity increases when the assessment is based on non-destructive tests. Skilled technicians are often required to make a decision based on automatic assessments of welds. Technicians consider the results of the automatic assessments and use their expert...

The use of D reconstruction based on active laser triangulation techniques is very complex in industrial environments. The main problem is that most of these techniques are based on laser stripe extraction methods which are highly sensitive to noise, which is virtually inevitable in these conditions. In industrial environments, variable luminance,...

The detection of periodical defects is of primary importance in the manufacturing of many long flat products. As an example, a thick steel block is rolled (passed through several pairs of rolls) to obtain a long steel strip. When a roll has a flaw, it provokes a periodical defect on the strip. If the defect is not detected promptly, a large number...

This document presents a technique to detect a particularly serious problem: periodical defects. Periodical defects can cause serious damage to steel strips, and so should be corrected as quickly as possible. The technique proposed, which is based on information provided by an artificial vision system, reports on periodical defects detected in one...

Temperature measurement based on infrared radiation depends on correctly adjusted emissivity. However, emissivity configuration is complex as emissivity is not normally known with precision; it is influenced by radiation reflections and can also vary with the temperature. The wedge method is a temperature measurement method which assures the select...

Accurate temperature measurement in industrial environments is as important as it is challenging. Precise control over temperature measurement is especially important when processing metals, such as iron or steel, where temperature monitoring is critical to productivity and product quality. In the steel manufacturing process, temperature measuremen...

Quality evaluation of rolling processes in the metal industry involves an inspection of the shape of the outgoing products in real-time during manufacturing. Shape measurement systems are usually based on 3D reconstructions of the surface of the rolled products. As surface properties are crucial, these systems favour contactless techniques. Based o...

Nowadays machine vision applications require skilled users to configure, tune, and maintain. Because such users are scarce, the robustness and reliability of applications are usually significantly affected. Autonomic computing offers a set of principles such as self-monitoring, self-regulation, and self-repair which can be used to partially overcom...

Advances in the image processing field have brought new methods which are able to perform complex tasks robustly. However, in order to meet constraints on functionality and reliability, imaging application developers often design complex algorithms with many parameters which must be finely tuned for each particular environment. The best approach fo...

The steel strips produced in steel-making plants, are used as raw material in many other industries, so qual-ity control is an essential aspect. One factor that indi-cates the quality of a steel strip is the number of defects, such as holes or scratches, on its surface. This paper describes a technique to detect an especially harmful type of surfac...

Quality control is of utmost importance in the metal industry. It requires online measurement and inspection systems which provide precise feedback to closed-loop controllers in industrial facilities. In rolled products, shape is one of the main quality criteria. In this work a low-cost, real-time 3D shape measurement system for long, flat-rolled p...

Infrared imaging is based on the measurement of radiation of an object and its conversion to temperature. A vital parameter of the conversion procedure is emissivity, which defines the capability of a material to absorb and radiate energy. For most applications, emissivity is assumed to be constant. In applications measuring the temperature of obje...

Flatness is a major geometrical feature of rolled products specified by both production and quality needs. Real-time inspection of flatness is the basis of automatic flatness control. Industrial facilities where rolled products are manufactured have adverse environments that affect artificial vision systems. We present a low-cost flatness inspectio...

Temperature measurement based on infrared radiation depends on correctly adjusted emissivity. However, emissivity configuration is not an easy task because emissivity is not normally known with precision, it is influenced by radiation reflections, and can also change with the temperature. The wedge method is a temperature measurement method which a...

Quality control is very important in the iron and steel industry to ensure that products meet customer requirements. Flatness is one of the most important features of rolled products, and it is used to estimate the final quality of the resulting product. Therefore, flatness control, which requires precise flatness measurements, is of vital importan...

For many image processing applications, edge detection is a very important task that needs to be assessed, since the success or failure of these applications depends on the performance of this task. Assessment of edge detection is largely subjective; however, current trends in the image processing community are moving toward objective assessment. I...

In this work, a method to detect infrared profiles patterns in real-time is proposed. The method is based on real-time segmentation of infrared images acquired using an infrared line-scanner. The segmentation is based on the detection of edges which indicate the change of the current infrared profile pattern. The segmentation consists of the calcul...

Thermographic devices that are able to acquire images, such as infrared line scanners (IRLSs), are becoming increasingly popular. One of the major issues when working with this kind of device is spatial calibration, which is necessary to extract metric information from images. In this paper, a spatial calibration procedure for IRLSs is proposed. Th...

Image filtering is a very important task in any image-processing system, since the output of the filtering constitutes the primary input to high-level vision, which then utilizes domain-specific knowledge to interpret and analyze the image contents. We propose a new approach to filtering the noise of a stream of thermographic line scans. The filter...

Muchas de las herramientas de e-learning actuales corresponden al modelo asíncrono, donde instructor y alumnos interactúan desde espacios y tiempos diferentes. El modelo de e-learning síncrono permite incorporar estrategias probadas con éxito en la enseñanza presencial, donde el apoyo visual del instructor a las explicaciones facilita la comprensió...

Some steel manufacturing lines require a continuous infinite steel strip for their permanent operation. In order to fulfill this requirement, single steel strips are welded in the input section of these lines. However, welding becomes a critical process, since a possible failure could delay the normal operation of a manufacturing line for days, mak...

The development of many measurement and inspection systems of products based on real-time image processing can not be carried out totally in a laboratory due to the size or the temperature of the manufactured products. Those systems must be developed in successive phases. Firstly, the system is installed in the production line with only an operatio...

Journal: World Academy of Science, Engineering and Technology

Journal: World Academy of Science, Engineering and Technology

Uneven temperature across the width of steel strips during rolling generates flatness defects due to differences in the contraction of the longitudinal fibers that make up a strip. In this work, a compensation process to modify the objective flatness using information about the temperature differences is designed. Compensation for uneven temperatur...

The recent demand for extremely thin high-quality steel products makes temperature control an increasingly determining factor in the final quality. In fact, uneven temperature during thin steel production makes the steel fracture rate increase sharply. This work proposes a method to recognize a common uneven temperature pattern known as the hot-sho...

Thermographic devices which are able to acquire images, such as infrared line scanners, are becoming increasingly popular. One of the major issues when working with this kind of devices is accurate spatial calibration, necessary in order to extract metric information from images. In this work, a spatial calibration procedure for infrared line scann...

Throughout the years, the developers of distributed systems have used different technologies to communicate the processes that constitute a system. Starting from sockets, as the rawest communication technology, they quickly evolved towards Remote Procedure Call (RPC) technology, searching for a simpler and effective programming paradigm. With the a...

First Page of the Article

In order to communicate the processes that constitute the current distributed applications, remote object technologies are currently used, but recently, XML Web services arises as a new and promising technology. This article focuses on comparing the relative performances of both communication technologies.

Journal: TRANSACTIONS ON ENGINEERING, COMPUTING AND TECHNOLOGY

Journal: TRANSACTIONS ON ENGINEERING, COMPUTING AND TECHNOLOGY